FUSE.jl Fusion Physics Learning Suite

A comprehensive educational toolkit for fusion plasma physics simulation and analysis, demonstrating FUSE.jl capabilities through realistic tokamak plasma modeling.

🎯 Overview

This project provides a complete fusion physics learning environment with:

• Realistic plasma profile generation (H-mode tokamak plasmas)
• Transport physics analysis (neoclassical and turbulent)
• Power balance calculations (heating, fusion, radiation, conduction)
• Stability analysis (MHD ballooning and Mercier criteria)
• Performance metrics (energy confinement time, Lawson parameter, fusion gain Q)

🚀 Quick Start

Prerequisites

• Julia 1.11.6 or later
• Basic understanding of fusion physics (optional - examples are educational)

Installation & Running

# Clone the repository
git clone https://github.com/Sarvesh2304/FUSE-Fusion-Physics-Suite.git
cd FUSE-Fusion-Physics-Suite

# Run the main analysis (recommended first run)
julia fusion_analysis_fixed.jl

# Run focused physics calculations
julia fusion_calculations.jl

# Run educational introduction
julia fusion_learning_example.jl

📁 Project Structure

🔥 Primary Files (Run These)

File	Purpose	Key Features
fusion_analysis_fixed.jl	Main analysis script	Complete end-to-end fusion plasma analysis with realistic physics
fusion_calculations.jl	Physics utilities	D-T fusion, ITER scaling, transport, stability calculations

📚 Educational Files

File	Purpose	Best For
fusion_learning_example.jl	Conceptual introduction	Learning fusion physics basics
FUSE_LEARNING_SUMMARY.md	Project documentation	Understanding the complete suite

🔧 Utility Files

File	Purpose	When to Use
fusion_analysis.jl	Original version (superseded)	Reference for what was "fixed"
simple_fuse_example.jl	FUSE.jl package test	When FUSE.jl loading issues are resolved

🔬 Physics Results

Current Tuned Configuration

• Fusion Gain (Q): ~4.5 (approaching breakeven)
• Energy Confinement Time (τ_E): ~10 seconds (realistic for fusion plasmas)
• Lawson Parameter (nτ): ~5.6 × 10²⁰ m⁻³·s (above breakeven threshold)
• Plasma Beta (β): ~3.7% (stable MHD operation)
• Stability: Mercier stable, ballooning stable

Plasma Parameters

• Core Temperature: 15 keV (electron), 13.5 keV (ion)
• Core Density: 8 × 10¹⁹ m⁻³
• Magnetic Field: 5 T
• Safety Factor: q₀ = 1.0, q₉₅ ≈ 2.8

🛠️ Customization & Tuning

Adjusting Fusion Performance

To modify Q and τ_E values, edit these parameters in fusion_analysis_fixed.jl:

# Heating power (affects Q directly)
P_heating = 3e5 .* exp.(-r_a ./ 0.3)  # W/m³

# Turbulent transport (affects τ_E)
χ_turbulent = 3e-3 .* exp.(-r_a ./ 0.3)  # m²/s

# Plasma profiles (affects fusion power)
T_0 = 15.0    # keV (core temperature)
n_0 = 8e19    # m⁻³ (core density)

Parameter Sensitivity

• Higher Q: Reduce P_heating or increase T_0, n_0
• Higher τ_E: Reduce χ_turbulent or P_heating
• Stability: Monitor β and D_mercier values

📊 Example Output

=== CORRECTED Performance Metrics ===
  Total plasma energy: 4.08 MJ/m³
  Total power loss: 0.41 MW/m³
  Energy confinement time: 9.97 s
  Lawson parameter: 5.63 × 10²⁰ m⁻³·s
  Fusion gain Q: 4.53

=== Physics Validation ===
  ✅ τ_E is positive: 9.97 s
  ✅ τ_E is in realistic range (0.1-10 s)
  ✅ Net power is positive
  ✅ Radiation fraction is reasonable (<50%)
  ✅ Mercier stable

🔬 Physics Concepts Demonstrated

Fusion Reaction Physics

• D-T fusion cross-sections and power density
• Lawson criterion for breakeven
• Fusion gain factor Q

Plasma Confinement

• ITER-89P energy confinement scaling
• Gyro-Bohm transport analysis
• H-mode threshold (Martin scaling)

Transport Physics

• Neoclassical transport (collisional)
• Turbulent transport (microturbulence)
• Heat vs particle diffusivity (χ/D ≈ 3)

Stability Analysis

• Troyon limit for MHD stability
• Ballooning mode stability
• Mercier criterion for pressure-driven instabilities

🎓 Educational Value

This suite is perfect for:

• Students learning fusion physics
• Researchers understanding tokamak plasmas
• Engineers working with fusion systems
• Anyone interested in clean energy physics

🚧 Known Issues & Limitations

FUSE.jl Package

• Issue: Precompilation problems with Julia 1.11.6
• Workaround: All examples work independently without FUSE.jl
• Status: Package installed but needs compatibility fixes

Physics Approximations

• Simplified transport models (not full gyrokinetic)
• Approximate fusion cross-sections
• Idealized plasma profiles

🤝 Contributing

Contributions welcome! Areas for improvement:

• More realistic transport models
• Additional stability criteria
• Better visualization tools
• More fusion scenarios

📚 References

• FUSE.jl Documentation
• ITER Physics Basis
• Fusion Energy Sciences

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

👨‍💻 Author

Sarvesh Pardeshi (@Sarvesh2304)

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🎉 Acknowledgments

• FUSE.jl development team at ProjectTorreyPines
• Fusion physics community
• Julia language developers

Ready to explore fusion physics? Start with fusion_analysis_fixed.jl! 🚀